Bleeding after sex while 34 weeks pregnant

!!!!!! UPDATE: I ended up coming in and low and behold I’m 3 centimeters dilated but since my Dr. hasn’t done a pelvic exams since I was 8-9 weeks pregnant they don’t know if I’ve been like this for weeks or just hours. So they have me hooked up to monitors and decided to keep me for 24 hours to see how everything goes. I’ve been having mild contractions, worst than I have had before at home, but still tolerable so they have been giving me dilotted ( a narcotic for pain ) to settle them down and try and make them stop and make me sleep through them. They checked my cervix again a few hours ago and I’m still 3 centimeters so I’m only staying here now just so that they can give me the second shot of steroid for my little girls lungs.

Me and my boyfriend had sex and after we finished there was blood EVERY WHERE. There’s pieces of blood clots too. I’m 34 weeks pregnant and this is the first time this has happened. I’m so scared.! It’s Sunday and my doctors office is closed. Is it normal.? What should I do. HELP ME.